Dental x-ray film holder



April 29, 1941. R. KREIDER DENTAL X-RAY FILM HOLDER Filed Aug. 14, 1940INVENTOR. R ymond L. M-e/ c/er ATTORNEY.

a dental film holder of rubber which is Patented Apr. 29, 1941 DENTALX-RAY FILM HOLDER Raymond L. Kreider, Erie, Pa. Application August 14,1940, Serial No. 352,531

1 Claim.

This invention relates generally to dental X-ray film holders and moreparticularly to holders which are gripped and held in place by the teethof the patient.

This application is a continuation in part of Raymond L. Kreidersapplication, Serial No. 243,209. 7

All devices of this character made according to the teachings of theprior art and. with which I am familiar, have been made of materialswhich caused a certain amount of clouding or fogging of the film becauseof the radiopacity of materials used in the manufacture of the holders.Some of the X-ray film holders have been found to be injurious to themouth tissues because of projecting sharp edges. All dental X-ray filmholders now in use cast a shadow on the film, thereby making the pictureless valuable, since the study of X-ray film is a study of shadows ofthe object X-rayed. Secondary radiation caused by materials used inmanufacturing these prior film holders have caused clouding and foggingof the film. Where pockets have been provided for holding X-ray films,they have proven unsatisfactory because dirt clogs the film and the filmpocket is inserted and retrieved from the pocket with great difiiculty.Material in these holders likewise causes clouding and fogging of thefilm.

It is, accordingly, an object of my invention to overcome the above andother defects in dental X-ray film holders and it is more particularlyan object of my invention to provide a dental X-ray film holder adaptedto be gripped between the teeth of the patient which is cheap in cost,flexible in structure, and easy to manufacture.

Another object of my invention is to provide a dental X-ray film holderwhich presents no secondary radiation when X-rays pass therethroughthereby providing clear X-ray film.

Another object of my invention is to provide a dental X-ray film holderwhich has simple means for holding the film and which may be used forX-raying any tooth in the mouth.

Another object of my invention is to provide a dental X-ray film holderwhich may be used and sterilized indefinitely and which is nontoxic. 1

Another object of my invention is to provide a dental X-ray film holdermanufactured of materials which eliminate secondary radiation.

Another object of my invention is to provide soft in texture.

Other objects of my invention will become evident from' the followingdetailed description,

taken in conjunction with the accompanying drawing, in which 'Fig. 1 isa fragmentary side elevational view in cross-section of my novel dentalX-ray film holder gripped in place between the teeth.

Fig. 2 is a perspective view of my novel dental X-ray film holder.

Fig. 3 is a perspective View of my novel X-ray film holder with the filmpartly removed from the holder.

Fig. 4 is a fragmentary side elevational view in cross-section showingmy novel X-ray film holder gripped between the posterior teeth.

Fig. 5 is a perspective view of my novel dental X-ray film holder forX-raying anterior teeth as shown in Fig. 1.

Fig. 6 is a perspective view of the film holder shown in Fig. 5 with thefilm disposed in the holder.

Referring to the drawing, Figs. 1 and 2 show a flat member I having alaterally extending bite tab 2 adapted to be gripped between the teethas shown in Figs. 1 and 4 to hold the X-ray film holder in placeadjacent the lingual surface of the teeth in order that a clear X-rayfilm of the crowns of the upper and lower teeth may be produced. Thefiat member I has flanges 3 disposed on opposite ends thereof which formgrooves 4 for receiving any standard film packet 5 (Fig. 3) now on themarket. Where it is desired to X-ray the anterior teeth as shown in Fig.1, the bite tabe 6 is disposed lengthwise of the fiat member 1 and theflanges 8 are disposed on the sides of the fiat member so that the X-rayfilm may be disposed in a horizontal position as shown in Fig. 1.

To overcome the radiopacity of the dental X-ray film holder andtherefore the secondary radiation, I manufacture the film holders fromthe following ingredients in the approximate proportions by weight asfollows:

Per cent Pure gum rubber 95 Sulphur 2 Trimene Base 2 The Trimene Baseset forth above is an aldehyde-amine reaction product and anti-oxidantas well as non-toxic. By the use of a mixture of the above ingredientsin the approximate proportions stated, I have found that no secondaryradiation is produced and radiolucense is obtained. This is so even inthe tab portion of the film in line with the horizontal tab portion ofthe fiat membet I which has heretofore caused the greatest difilculty inthe fogging of X-ray films. The aldehyde in the Trimene Base isformaldehyde. The amine is an aliphatic amine. It is a complex reactionproduct of an aldehyde and an aliphatic amine, the aldehyde involvedbeing a formaldehyde.

It will be evident that I have provided a dental X-ray film holder whichmay be used indefinitely, which may be sterilized, and which permits theproduction of a completed film free from shows and cloudiness.

Various changes may be made in the specific embodiment of the presentinvention without departing from the spirit thereof, or from the scopeof the appended claim.

Per cent Pure gum rubber 95 Sulphur 1 "A reaction product of aformaldehyde and an aliphatic amine 2 /2 RAYMOND L. KREIDER.

